hyperactivity

例句：

1. 1. He has a tendency to be overly energetic and restless.
   他倾向于过于活跃和不安。
2. 2. Many children with ADHD exhibit hyperactivity in their behavior.
   许多患有注意力缺陷多动障碍的儿童表现出行为上的过度活跃。
3. 3. The teacher noticed that the student was often distracted by his own hyperactivity.
   老师注意到这个学生经常因为自己的过度活跃而分心。